He says over half of NT revenue comes from GST and this is under threat with a decreasing population due to high living costs with electricity rising 30 per cent since 2012.

Promised infrastructure for remote communities and a public housing waiting lists were overlooked in the budget, he said.

But this came as families minister John Elferink spent $45,000 on a six-week trip to the US, visiting Cape Canaveral and Universal Studios, while housing minister Bess Price used $50,000 to pay for a stay at the Waldorf Astoria in New York.

Mr Gunner promised that if elected in August 2016, Labor would enforce greater transparency for ministerial travel.

He also promised to introduce an independent NT anti-corruption commission after the government backed down on a promise to examine political donations after its ties to Foundation 51 were revealed.